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Chronic Fatigue

What Causes It?

Although the cause of chronic fatigue is unknown, infection, hormone levels, and stress are also believed to play a role in its symptoms. Chronic fatigue often results from:
  • Sleep disturbance in combination with chronic pain and depression
  • Stress
  • Physical inactivity
  • Poor diet
  • Medications
  • Social and cultural factors
  • Certain medical conditions (see below).
Regardless of the cause, chronic fatigue has a major impact on day-to-day functioning and quality of life.
(Click Chronic Fatigue Causes for more information.)


A Symptom of Many Diseases

Chronic fatigue is a symptom of many diseases. Common conditions that can cause chronic fatigue include:


If a patient receives a diagnosis of any of these conditions, they would be excluded from having chronic fatigue syndrome unless their condition has been treated sufficiently and no longer explains their fatigue and other symptoms.
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Information on Chronic Fatigue

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